Lamp



FIG. 1 is a view of the front of the lamp.

FIG. 2 is a view of the back of the lamp.

FIG. 3 is a view of the bottom of the lamp; and,

FIG. 4 is an exploded view of the lamp, with the broken lines forming no part of the claimed design. 

The ornamental design for a lamp, as shown and described. 